This is a discussion on A/F Ratio Gauge Question within the Interior Mods forums, part of the Tech & Modifying & General Repairs category; I'm gonna start getting a little more in depth with my car, but before I do I want to have ...

A/F Ratio Gauge Question

I'm gonna start getting a little more in depth with my car, but before I do I want to have some gauges so I can make sure everything is copasetic on a day-to-day basis. I was particularly curious about A/F gauges. If I get one, can it be hooked up to the front O2 sensor? I ask because I have the PEP MIL Eliminator on the rear one... Also, does anyone have a recommendation for a good A/F gauge or are they all pretty much the same?

Thanks

-MK

'03 WRX
'01 2.5RSMODS | PICS | Dyno
"Stuff sold by the gram is always going to be more exciting than stuff sold by the pound." - Jeremy Clarkson

The gauge idea is a good one. Monitoring what's going on under the hood is always beneficial!

Most A/F gauges (all, IIRC) won't work with the "semi" wideband front O2 sensor. Your MIL Eliminator will also give you "false" readings from the rear sensor. This is all rather moot however as traditional narrow-band A/F gauges are nothing but decoration. As far as tuning goes (anything away from idle really) you really need a Wideband O2...

You'd be better served by gauges that will tell you the health/condition of your mill... Boost/EGT/Oil pressure/Fuel Pressure/Oil Temp/Coolant Temp, etc...

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